磨牙区牙弓宽度差异无显著性。
No significant difference was found for the intermolar width.
牙弓的扩大主要是牙弓宽度的增加。
The expansion of the arch was mainly caused by the mcrease of arch width.
比较治疗前后牙弓宽度变化。
结论：上、下牙弓宽度不调与牙周病有密切关系。
CONCLUSION: the dis-coordination of the dental arch width in maxilla and mandible has an affinity with periodontal disease.
目的：研究拔牙矫治对牙弓宽度和基骨宽度的影响。
Objective: To investigate the effects of tooth extraction on dental arch width and alveolar bone width.
经治疗和保持后，上下牙弓宽度和长度并非一定会复发。
Not all of dental arch width and length will relapse after retention.
结论：RE主要增加前段牙弓宽度，以中切牙间距离最明显。
Conclusions: RE expanded anterior arch width especially the distance of mid-anterior.
测量两组尖牙牙弓宽度、磨牙牙弓宽度及磨牙牙槽弓宽度，并计算上、下颌对应的牙弓、牙槽弓宽度差。
The inter-canine, inter-molar and alveolar widths were measured and the differences between maxillary and mandible width calculated.
目的 了解福建省北部地区政和县儿童牙弓宽度，为研究当地儿童牙弓宽度生长发育的规律和特点提供依据。
Objective The objective of the study is to obtain the data of the arch width of the children in Zhenghe, Fujian, and to know the development regularity and characteristics of the growth of the tooth.
用数显游标卡尺测量实验组模型牙冠高度，牙弓宽度和长度，计算出临床冠中心高度，并与对照组进行对比分析研究。
The height of crowns, the center height of clinical crowns, and the width and length of the dental arch were measured with a digital vernier calliper.
结果：上颌矫治后尖牙间牙弓宽度和基骨宽度明显增加（P< 0 .0 1） ，前磨牙间牙弓宽度和基骨宽度明显减小（P< 0 .0 1）。
Results: After treatment, in maxilla the arch width and alveolar bone width between canines were in creased(P<0.01), those were decreased between second premolars(P<0.01 ).
结果（1）单侧完全性唇腭裂术后患者中出现上下颌牙弓宽度不调的比率为6 0 .4 % ，双侧后牙反为33.3% ，单侧后牙反为16 .7%。
Results (1)Dental arch transverse discrepancy was seen in 60.4% , bilateral posterior crossbite in 33.3% , and unilateral posterior crossbite in 16.7% of patients with UCLP, respectively .
结果治疗后牙弓、基骨的宽度比治疗前增加，统计学分析有显著性差异。
Result The increase of width of dental arch and basal bone has statistically significant difference.
下牙弓变化中，第二双尖牙间和磨牙间宽度增加有显著性差异。
In addition, the changes of width between second bicuspid and mandibular molars showed statistical significances.
②肌位牙位不调与否的两组间在上下牙弓后段宽度上存在差异；
Significant difference of the posterior arch-widths was observed between the group with and without ICP-MCP discrepancy.
②肌位牙位不调与否的两组间在上下牙弓后段宽度上存在差异；
Significant difference of the posterior arch-widths was observed between the group with and without ICP-MCP discrepancy.
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